One of our customers contacted us to help him modify the filter of his LINTON to improve its performance. We have made a video explaining the whole process, you can watch it below:

As mentioned in previous posts on the Wharfedale Linton, the filters that come standard with the cabinets are a 2nd order electrical design with acceptable quality components, especially considering the RRP of these loudspeakers. There are 3 ferrite core coils and one air-core coil (the latter corresponds to the tweeter section). Ferrite core coils are cheaper and smaller than air-core coils if the same section of copper wire is used, but they introduce more distortion than air-core coils. In the case of the coil that goes in series with the midrange speaker we would have used an air-core coil without any hesitation.

There is a polypropylene capacitor in the tweeter section and the rest of the capacitors are either mylar or electrolytic. The mylar capacitors have a lower quality than the propylene ones but are still much better than the electrolytic ones. Another point for improvement is the electrolytic capacitors, especially a 22uF capacitor in series with the midrange speaker.

The resistors are all 5W ceramic resistors of very low quality. The wiring and the "fast-on" connectors that come with the box are of very poor quality, in fact the cable has greenish tones at the ends, a symptom of copper oxidation and indicative of poor quality cable, especially when this oxidation has occurred in just a few months.

FILTER MODIFICATION KIT:

Of the original components, we have left an 18uF polyester capacitor and two coils, one ferric core and one air core. The rest of the components included in the filter modification KIT, including the cables and fast-on connectors, have been replaced by those listed below:

2x Mundorf Mcap EVO Oil 6,8 uf

2x Mundorf Mcap EVO Oil 15 uf

2x Mundorf Mcap EVO SGO 0,68 uf

2x Mundorf MCOIL L140 AIRCORE 2,7 mH

2x Mundorf MCOIL L140 AIRCORE 0,68 mH

4x Mundorf Mresist Supreme 2,20 ohmios

2x Mundorf Mresist Supreme 5,60 ohmios

2x Mundorf Mresist Supreme 6,80 ohmios

2x Mundorf Ecap Audio Plain 82,00 uf

2x Mundorf Mcap Classic 22,00 uf

2x Mundorf Mcap Classic 8,20 uf

2x Mundorf Mcap Classic 2,20 uf

Tellurium Q Blue II wiring with fast-on connectors installed, cut and ready to install in the filter.

A couple of metres of good quality tin should be added (in our case we used Mundorf Msolder Silver Gold). 

The final result can be purchased on our website at the following link: https://bit.ly/3Wv1uDA

Conclusions:

The improvement is evident across the entire frequency range. Starting with the bass, which is much more controlled, reducing the bass roll-off tendency that is present with the standard filter. At the same time, details and nuances appear that were previously hidden. In the midrange the difference is even greater, the timbre is much more real, richer and more exciting. The attacks of the notes are much more defined and the treble has gained in refinement and extension. We can affirm that the Linton's with the modified filter are tremendously superior and that this modification puts them on a level where they can look at boxes of many thousands of euros. Therefore we have no doubt that the modification is worth it.

Anyone who wants to listen to them, even if you have an original (or modified) Linton, is welcome to come and listen to them.

You can make an appointment here: Contact us